S&P/TSX GLOBAL MINING INDEX - DECEMBER 2010 - QUARTERLY REVIEW

ADDITIONS

Issue Name                         Symbol Exchange

Augusta Resource Corporation         AZC     TSX

Avalon Rare Metals Inc.              AVL     TSX

Baja Mining Corp.                    BAJ     TSX

Breakwater Resources Ltd.            BWR     TSX

Cline Mining Corporation             CMK     TSX

Cloud Peak Energy Inc.               CLD     NYSE

Copper Mountain Mining Corporation   CUM     TSX

Crocodile Gold Corp.                 CRK     TSX

ECU Silver Mining Inc.               ECU     TSX

Endeavour Silver Corp.               EDR     TSX

Gold Resources Corp.                GORO     AMEX

Golden Minerals Company              AUM     TSX

Intrepid Mines Limited               IAU     TSX

Keegan Resources Inc.                KGN     TSX

MAG Silver Corp.                     MAG     TSX

Minera Andes Inc.                    MAI     TSX

Platinum Group Metals Ltd.           PTM     TSX

Sabina Gold & Silver Corp.           SBB     TSX

Sulliden Gold Corporation Ltd.       SUE     TSX

UEX Corporation                      UEX     TSX

Uranium Energy Corp.                 UEC     AMEX
S&P/TSX GLOBAL BASE METALS INDEX - DECEMBER 2010 - QUARTERLY REVIEW 


ADDITIONS

Issue Name                         Symbol Exchange

Augusta Resource Corporation         AZC     TSX

Avalon Rare Metals Inc.              AVL     TSX

Baja Mining Corp.                    BAJ     TSX

Breakwater Resources Ltd.            BWR     TSX

Cline Mining Corporation             CMK     TSX

Copper Mountain Mining Corporation   CUM     TSX

Sabina Gold & Silver Corp.           SBB     TSX

Copper Mountain Mining Corporation - Drilling in Oriole Zone Confirms Higher Grade Mill Feed

12/13/2010 8:30 AM - Canada NewsWire

VANCOUVER, Dec. 13, 2010 (Canada NewsWire via COMTEX News Network) --

Web Site: www.CuMtn.com TSX: CUM

Copper Mountain Mining Corporation ("CMMC" or the "Company") announce assay results from 20 diamond drill-holes completed in the Oriole and Rifle areas of the Copper Mountain project, where a major drill program continues. Two deep holes have been completed below the Pit 3 area and have been logged, split and the core has been sent out for assay. Additionally, a number of deep, angle holes have been recently drilled around and below the planned superpit targeting geophysical anomalies and possible extensions to mineralization. Assays for the deep holes are pending.

Oriole Area: The drill program in the Oriole area provides results required to complete a detailed mine plan which allows for additional near surface extraction of higher grade material in the early years of production. A total of 2,200 m of drilling was completed in 16, shallow drill-holes, which were primarily infill holes on the margins of the proposed pit area. The drilling provided more definitive geological and grade information and, together with the shallow percussion drilling, completed in October, will result in improved reserve modelling. All of the holes from the current program are inclined at -45 degrees and drilled on east-west sections across the vertically oriented mineralization. All but one of the holes returned above cut-off grade mineralized intersections. A summary of the more significant intersections are provided in the table below:

 ____________________________________________________
|Hole ID |From |  To |Interval (m)|Cu %|Ag gmt|Au gmt|
|________|_____|_____|____________|____|______|______|
|CM10O-21|26.0 |53.0 |       27   |0.33| 2.06 | 0.09 |
|________|_____|_____|____________|____|______|______|
|CM10O-21|68.8 |92.5 |      23.7  |0.57| 1.62 | 0.07 |
|________|_____|_____|____________|____|______|______|
|CM10O-23|48.1 |100.5|      52.4  |0.38| 2.53 | 0.08 |
|________|_____|_____|____________|____|______|______|
|CM10O-26|74.5 |102.1|      27.6  |0.58| 3.81 | 0.07 |
|________|_____|_____|____________|____|______|______|
|CM10O-28|74.7 | 117 |      42.3  |0.44| 2.20 | 0.03 |
|________|_____|_____|____________|____|______|______|
|CM10O-29|60.0 |88.8 |      28.8  |0.48| 2.10 | 0.04 |
|________|_____|_____|____________|____|______|______|
|CM10O-29|137.1|144.6|      7.5   |1.69| 7.72 | 0.08 |
|________|_____|_____|____________|____|______|______|
|CM10O-30|58.4 |72.0 |      13.6  |1.99|13.67 | 0.14 |
|________|_____|_____|____________|____|______|______|
|CM10O-32|32.6 |60.0 |      27.4  |0.66| 6.41 | 0.04 |
|________|_____|_____|____________|____|______|______|
|CM10O-35|24.0 |87.0 |      63.0  |0.28| 1.78 | 0.03 |
|________|_____|_____|____________|____|______|______|

Rifle Area: An additional four holes were drilled on the margin of a geophysical chargeability anomaly in an area approximately 1 km south of the Oriole deposit. This area was originally proposed for waste rock storage. Past exploration had defined a low level soil geochemical anomaly in the area and a number of near-surface intersections had been obtained in past drilling. The four new holes that form two east-west sections were drilled to determine the orientation and geological characteristics of the mineralization. Not all assays have been received but results thus far confirm the presence of mineralization. Additional follow up work is being planned prior to using this area for waste rock storage.

A summary of the more significant intersections are provided in the table below:

 ____________________________________________________
|Hole ID |From |  To |Interval (m)|Cu %|Ag gmt|Au gmt|
|________|_____|_____|____________|____|______|______|
|CM10R-01|68.9 |84.9 |      24.0  |0.35| 1.49 | 0.03 |
|________|_____|_____|____________|____|______|______|
|CM10R-02|                              NSR          |
|________|___________________________________________|
|CM10R-03|83.2 |101.2|      18.0  |0.39| 1.15 | 0.02 |
|________|_____|_____|____________|____|______|______|
|CM10R-03|147.0|159.0|      15.0  |0.27| 1.20 | 0.03 |
|________|_____|_____|____________|____|______|______|
|CM10R-04|                     Assays pending        |
|________|___________________________________________|

The mineralized system at Copper Mountain is classified as a bulk-tonnage, alkalic porphyry copper deposit that is hosted within Nicola Group volcanic rocks. Mineralization is structurally controlled and focused at multi-directional vein intersections and within vein stockwork systems. Drill holes are usually drilled at angles of -45 or -55 degrees to provide the best indication of the lateral extents of vertically oriented mineralization.

Quality Assurance The company employs a system of quality control for drill results which includes the use of blanks, certified reference material (standards) and check assaying. Core is logged on site and split with a diamond saw. Samples are shipped to Pioneer Laboratories for geochemical analysis of copper with all values of greater than 1000 ppm copper being re-analysed by assay methods for copper, gold and silver. The drilling program is being supervised by Peter Holbek, M.Sc., P.Geo., a qualified person as defined by National Policy Instrument 43-101.

About Copper Mountain Mining Corporation: Copper Mountain is a Canadian resource company managed by an experienced team of professionals with a solid track record of exploration and development success. The Company's shares trade on the Toronto Stock Exchange under the symbol "CUM". Copper Mountain owns 75% and Mitsubishi Materials Corporation owns 25% of the Copper Mountain Project. The 18,000 acre mine site is located 20 km south of the town of Princeton in southern British Columbia. The Copper Mountain Project has a current resource of approximately 5 billion pounds of copper, the project is fully financed ($438M) and in construction and on schedule for the mine to produce approximately 100 million pounds of copper per year by mid 2011. Additional information is available on the Company's web page at www.CuMtn.com.

On behalf of the Board of COPPER MOUNTAIN MINING CORPORATION

"Peter Holbek"

Peter Holbek VP Exploration

Note: This release contains forward-looking statements that involve risks and uncertainties. These statements may differ materially from actual future events or results. Readers are referred to the documents, filed by the Company on SEDAR at www.sedar.com, specifically the most recent reports which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements. The Company undertakes no obligation to review or confirm analysts' expectations or estimates or to release publicly any revisions to any forward-looking statement.

To view this news release in HTML formatting, please use the following URL: http://www.newswire.ca/en/releases/archive/December2010/13/c4501.html

SOURCE: Copper Mountain Mining Corporation

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